Home / 853,815.30-1,280,334.15-380,256.90

Finding the Fourth Proportional to 853,815.30, 1,280,334.15 and 380,256.90

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Solution

The fourth proportional to 853,815.30, 1,280,334.15 and 380,256.90 is: 570,212.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,815.30 : 1,280,334.15 = 380,256.90 : x
  2. Step 2: Convert to fraction form
    853,815.30/1,280,334.15 = 380,256.90/x
  3. Step 3: Cross multiply
    853,815.30x = 1,280,334.15 × 380,256.90
  4. Step 4: Simplify right side
    853,815.30x = 486,855,894,843.14
  5. Step 5: Solve for x
    x = 486,855,894,843.14/853,815.30
  6. Step 6: Final answer
    x = 570,212.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.